Sensation and Perception Flashcards

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1
Q

What is sensation?

A

detection of stimuli by sensory receptors;
physiological process

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2
Q

what is perception?

A

way that sensory information is interpreted,
organized, & consciously experienced; psychological
process

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3
Q

what is the Absolute Threshold?

A

minimum amount
of stimulus energy that must be present for
the stimulus to be detected 50% of the time

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4
Q

what is Just noticeable difference (JND)?

A

the
minimum difference in stimuli required to
detect a change or a difference between stimuli

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5
Q

What is Bottom-up processing?

A

system in which perceptions are
built from sensory input. Quickly making sense of
stimuli that are sensed. ( what am i seeing?)

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6
Q

what is Top-down processing?

A

interpretation of sensations is
influenced by available
knowledge, experiences, &
thoughts ( is this something ive seen before?)

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7
Q

What does the cornea do?

A

Serves as protection,Focuses most of the light coming
into the eye

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8
Q

what is the Pupil?

A

Small opening in the eye through which light passes. Can increase in size to allow more light in, or decrease to reduce light.

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9
Q

what is the Iris?

A

Colored portion of the eye; muscles attached to it control
pupil

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10
Q

what is the Lens?

A

Curved, transparent structure behind the pupil that provides
additional focus

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11
Q

what is the Retina?

A

Light-sensitive lining on the back of the
eyeball, final stop for light in the eye

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12
Q

What are the two photoreceptors?

A

Cones and Rods

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13
Q

what do Cones do?

A

Responsible for color vision, detailed vision, spatial
resolution

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14
Q

What do Rods do?

A

Responsible for non-color, less detailed vision and
detection of movement on periphery of visual field

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15
Q

What is the optic nerve?

A

Carries visual information from the retina to the brain

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16
Q

What is the pinna?

A

cartilage and skin
that makes up visible
outer ear

17
Q

what is the Cochlea?

A

fluid-filled, snail-shaped
structure that contains basilar
membrane & sensory receptors